Post-WWII Germany: Nearly a decade after his affair with an older woman came to a mysterious end, law student Michael Berg re … 【15】SIMPLE 3 【16】SHARE THE SAME PAST 1 【17】SHARE THE SAME PAST 1 【18】SHARE THE SAME … The number eighteen with a red stroke through it, indicating a location where a person must be aged 18 or above to enter. Often used … 十八禁，亦称18禁，指未满十八周岁者禁止接触含有色情、暴力、血腥等内容的媒介分类。中国《未成年人保护法》 … 18是介于17与19之间的自然数，属于偶数和合数，其质因数分解为2×3²，二进制表示为10010。 在化学领域中，18是氩的原子序数。 …